JP4893727B2 - Substrate transport apparatus, electronic component mounting apparatus, and electronic component mounting apparatus working method - Google Patents

Description

  The present invention relates to a substrate carrying device that is provided in an electronic component mounting device and carries a substrate, an electronic component mounting device, and an operation method for the electronic component mounting device.

  A substrate transfer device provided in an electronic component mounting apparatus such as a screen printer or an electronic component mounting apparatus has a substrate transfer path including one or more transfer conveyors installed on a base covered with a main body cover. The end of the conveyor that protrudes outside from the opening formed in the body cover is covered with a conveyor conveyor provided outside the body cover (Patent Document 1). The transport conveyor cover is used to access the transport conveyor from the outside in addition to the substrate passage opening that serves as a path for the substrate when the substrate is loaded into the transport conveyor from the outside or when the substrate is discharged from the transport conveyor to the outside. Access openings are provided. The access opening is covered with a door member provided on the transport conveyor cover so that the access opening can be opened and closed, and the operator can open the door member to check the transport conveyor and the substrate.

  Such a substrate transfer device is provided with a foreign matter intrusion detection sensor that detects when foreign matter enters from the substrate passage opening or when an operator mistakenly inserts a hand from the substrate passage opening during operation of the working device. Thus, when a foreign object or the like is detected by the foreign object intrusion detection sensor, the operation of the transfer conveyor is stopped to ensure the safety of the operator. An optical sensor is used as the foreign matter intrusion detection sensor, and the optical sensor is disposed between two sensor components (for example, a projector and a light receiver or a light projector and a light receiver and a reflector) provided facing each other in the width direction of the conveyor. Inspection light is transmitted and received, and intrusion of foreign matter from the substrate passage opening is detected based on a change in the light reception state of the inspection light.

In addition, the conveyance conveyor cover is provided with a door member opening / closing detection sensor that can detect the open / closed state of the door member, so that it is detected whether the door member is not opened at the start or during operation of the conveyance conveyor. It has become. Limit switches are often used for door member open / close detection sensors.
JP 2001-345594 A

  However, the above-described sensor is expensive and expensive, and there is a problem in that the signal processing configuration becomes complicated because independent signal processing must be performed for both sensors.

  Therefore, in the present invention, a substrate transport apparatus and electronic component mounting capable of detecting the intrusion of foreign matter from the substrate passage opening of the transport conveyor cover and the open / closed state of the door member covering the access opening with an inexpensive and simple configuration. It is an object of the present invention to provide a working method for an apparatus and an electronic component mounting apparatus.

The substrate transfer apparatus according to claim 1 covers a transfer conveyor for transferring a substrate and an end of the transfer conveyor, and the substrate is discharged from the transfer conveyor to the outside when the substrate is input to the transfer conveyor from the outside. A substrate conveyor opening serving as a substrate passage and a conveyance conveyor cover provided with an access opening for accessing the conveyance conveyor from the outside, and a door member provided on the conveyance conveyor cover so as to open and close the access opening. The first sensor component is fixed to the door member and the second sensor component is fixed to the transport conveyor cover. When the door member is closed, the first sensor component and the first sensor component are Inspection light can be exchanged between two sensor parts, and inspection light cannot be exchanged between the first sensor part and the second sensor part when the door member is opened. The open / close state of the door member is detected depending on whether or not inspection light can be exchanged between the optical sensor and the first sensor component and the second sensor component constituting the optical sensor, and the door member is closed. Foreign matter has entered the space covered by the transfer conveyor cover from the substrate passage opening based on the change in the state of the inspection light exchange between the first sensor component and the second sensor component. And detecting means for detecting this.

  The substrate transfer device according to claim 2 is the substrate transfer device according to claim 1, wherein when the door member is closed, the first sensor component and the second sensor component are transferred by a transfer conveyor. Inspection light is exchanged in the upper region of the substrate.

  The electronic component mounting apparatus according to claim 3 covers the transport conveyor for transporting the substrate and the end of the transport conveyor, and the substrate is discharged from the transport conveyor to the outside when the substrate is loaded into the transport conveyor from the outside. A substrate passage opening serving as a passage for the substrate and a transfer conveyor cover provided with an access opening for accessing the transfer conveyor from the outside, and a door provided on the transfer conveyor cover so as to freely open and close the access opening A first sensor component that is fixed to the door member and a second sensor component that is fixed to the transport conveyor cover, and the first sensor component when the door member is closed The inspection light can be exchanged between the first sensor component and the second sensor component. When the door member is opened, the inspection light is exchanged between the first sensor component and the second sensor component. The door member detects the open / closed state of the door member based on whether or not inspection light can be exchanged between the first sensor component and the second sensor component constituting the optical sensor. When the closed state is detected, foreign matter is introduced into the space covered by the transport conveyor cover from the substrate passage opening based on the change in the state of the inspection light exchange between the first sensor component and the second sensor component. A detection means for detecting the intrusion and a working device that transports and positions the substrate by a transport conveyor and performs an electronic component mounting operation on the positioned substrate.

  The electronic component mounting apparatus according to claim 4 is the electronic component mounting apparatus according to claim 3, wherein when the door member is closed, the first sensor component and the second sensor component are transport conveyors. Inspection light is exchanged in the upper region of the substrate conveyed by the above.

  According to a fifth aspect of the present invention, there is provided a work method for the electronic component mounting apparatus, comprising: a transport conveyor that transports a substrate; and an end portion of the transport conveyor, and when the substrate is loaded into the transport conveyor from the outside or from the transport conveyor to the outside. A substrate passage opening that serves as a passage for the substrate when the substrate is discharged, a conveyance conveyor cover provided with an access opening for external access to the conveyance conveyor, and an access opening provided on the conveyance conveyor cover that can be opened and closed freely. A first sensor component fixed to the door member and a second sensor component fixed to the transport conveyor cover, and the door member is closed when the door member is closed. Inspection light can be exchanged between the first sensor component and the second sensor component. When the door member is opened, the first sensor component and the second sensor component are A method of operating an electronic component mounting apparatus, comprising: an optical sensor that cannot transmit and receive inspection light; and a work apparatus that transports and positions a substrate by a transport conveyor and performs an electronic component mounting operation on the positioned substrate. The opening / closing state of the door member is detected based on whether or not inspection light can be exchanged between the first sensor component and the second sensor component constituting the optical sensor, and the door member is closed. When detecting, detection of foreign matter intruding into the space covered by the transport conveyor cover from the substrate passage opening based on the change in the state of the inspection light exchange between the first sensor component and the second sensor component I do.

  In the present invention, the open / close state of the door member is detected depending on whether or not inspection light can be exchanged between the first sensor component and the second sensor component of the optical sensor, and the door member is closed. When inspection light can be exchanged between the sensor component and the second sensor component, the substrate path of the transport conveyor cover is changed based on the change in the state of inspection light exchange between the first sensor component and the second sensor component. Intrusion of foreign matter from the opening can be detected. As described above, in the present invention, since the open / closed state of the door member can be detected by the optical sensor for detecting the intrusion of the foreign matter, a dedicated sensor for detecting the open / close of the door member becomes unnecessary, and it is inexpensive and simple. With the configuration, it is possible to detect the intrusion of foreign matter from the substrate passage opening of the transport conveyor cover and the open / closed state of the door member covering the access opening.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a screen printer according to an embodiment of the present invention, FIG. 2 is a side view of the screen printer according to an embodiment of the present invention, and FIG. 3 is a screen printer according to an embodiment of the present invention. FIG. 4 is a front view of a printing work execution unit constituting the screen printer in one embodiment of the present invention, and FIG. 5 is a block diagram showing a control system of the screen printer in one embodiment of the present invention. 6 (a) and 6 (b) are diagrams for explaining the operation of the printing work execution unit constituting the screen printing machine according to the embodiment of the present invention, and FIGS. 7 (a) and 7 (b) are diagrams for explaining an embodiment of the present invention. The perspective view of the conveyance conveyor cover of the screen printing machine in a form, and Fig.8 (a), (b) is a cross-sectional front view of the conveyance conveyor cover of the screen printing machine in one embodiment of this invention.

  In FIG. 1, a screen printing machine 1 as an example of an electronic component mounting apparatus provided with a board conveying apparatus according to the present embodiment carries a board PB loaded from the outside (arrow A1) into a predetermined work. Positioned at the position, screen printing is performed and the sheet is discharged to the outside (arrow A2). In the following description, the conveyance direction of the substrate PB in the screen printing machine 1 is the X-axis direction, and the horizontal plane direction orthogonal to the X-axis direction is the Y-axis direction. Also, the vertical direction is the Z-axis direction.

  2 and 3, the screen printing machine 1 includes a base 3 covered with a main body cover 2, a substrate transport path 4 that is provided on the base 3 and transports a substrate PB in the X-axis direction, and a base 3. A printing work execution unit 5 that is provided above and executes a screen printing work on the substrate PB is provided.

  2 and 3, the substrate transport path 4 includes a carry-in conveyor 11, a positioning conveyor 12, and a carry-out conveyor 13 provided side by side in the X-axis direction, each of which includes a pair of belt conveyors. The carry-in conveyor 11 protrudes to the outside (upstream side in the conveyance direction of the substrate PB) from the input side opening 2 a provided in the main body cover 2, and the carry-out conveyor 13 from the discharge side opening 2 b provided in the main body cover 2. It protrudes to the outside (downstream side in the conveyance direction of the substrate PB).

  The carry-in conveyor 11 carries the substrate PB input from the outside of the screen printing machine 1 into the screen printing machine 1 and delivers it to the positioning conveyor 12. The positioning conveyor 12 positions the substrate PB received from the carry-in conveyor 11 at the work execution position (the position of the substrate PB shown in FIG. 3), and after the screen printing operation for the substrate PB is completed, the substrate PB (screen printing is performed). The substrate PB) is transferred to the carry-out conveyor 13. The carry-out conveyor 13 carries the substrate PB received from the positioning conveyor 12 out of the screen printing machine 1.

In FIG. 4, the printing work execution unit 5 clamps the substrate PB positioned by the substrate transport path 4 (positioning conveyor 12), aligns the substrate PB in the horizontal plane (X-axis and Y-axis directions), and moves up and down. A substrate alignment unit 21 that performs alignment in the direction (Z-axis direction), a mask plate 22 and a squeegee unit 23 provided above the substrate alignment unit 21, and an XY robot 24 (FIG. 3). And the mask plate 22 and the camera unit 25 provided so as to be movable in the horizontal plane in the space between the mask plate 22 and the mask plate 22.
A syringe unit 26 for supplying the paste to is provided.

  In FIG. 4, the substrate alignment unit 21 of the printing work execution unit 5 includes a Y table 21a that moves relative to the base 3 in the Y axis direction, and an X table 21b that moves relative to the Y table 21a in the X axis direction. The θ table 21c that rotates relative to the X table 21b around the Z axis (within a horizontal plane), the base plate 21d fixed to the θ table 21c, the first elevating plate 21e that elevates relative to the base plate 21d, and the first elevating The second elevating plate 21f moves up and down relative to the plate 21e, the lower receiving unit 21g fixed to the second elevating plate 21f, and the clamper 21h including a pair of members that open and close in the Y-axis direction above the positioning conveyor 12. (See also FIG. 3).

  3 and 4, the mask plate 22 is supported at four sides by a mask frame 22a having a rectangular shape in plan view, and an inner region surrounded by the mask frame 22a has an upper surface of the substrate PB that is a printing object. A mask pattern (not shown) composed of a large number of holes corresponding to the shape, position, etc. of the electrode D (FIG. 3) formed on is provided.

  In FIG. 4, the squeegee unit 23 includes a moving plate 23 p provided so as to be movable in the Y-axis direction with respect to the substrate alignment unit 21, and two squeegee lifting cylinders (empty) attached to the moving plate 23 p and extending vertically. Pressure cylinder) 23s and two squeegees 23a that are attached to the lower part of each squeegee lifting cylinder 23s and face each other in the Y-axis direction. Each squeegee 23a is a “spar” -like member extending in the X-axis direction, and is moved up and down with respect to the moving plate 23p by a downward projecting operation of the squeegee lifting cylinder 23s.

  In FIG. 3, the XY robot 24 extends above the base 3 in the Y-axis direction, and is provided with a Y-axis stage 24a provided fixed relative to the base 3, and extends in the X-axis direction. The X-axis stage 24b is movably provided along the X-axis stage 24b, and the movable plate 24c is provided movably along the X-axis stage 24b. 4, the camera unit 25 has a configuration in which a moving plate 24c of the XY robot 24 is attached with a first camera 25a with an imaging surface facing downward and a second camera 25b with an imaging surface facing upward. Yes.

  In FIG. 4, the syringe unit 26 is provided with a syringe 26 a that discharges a paste to be printed on the substrate PB downward on a moving plate 26 p provided so as to be movable in a horizontal plane direction with respect to the substrate alignment unit 21. It becomes the composition.

  The substrate PB is conveyed and positioned by the carry-in conveyor 11, the positioning conveyor 12 and the carry-out conveyor 13 constituting the substrate conveyance path 4, and the control device 30 (FIG. 5) provided in the screen printing machine 1 includes an actuator or the like (not shown). This is done by controlling the operation of the transport path operating mechanism 31 (FIG. 5).

  Movement of the Y table 21a with respect to the base 3 in the Y axis direction, movement of the X table 21b with respect to the Y table 21a in the X axis direction, rotation of the θ table 21c with respect to the X table 21b around the Z axis, and rotation with respect to the base plate 21d (ie, θ The controller 30 controls the Y table to move the first elevating plate 21e (with respect to the table 21c), the second elevating plate 21f with respect to the first elevating plate 21e (that is, the lowering unit 21g) and the opening / closing operation of the clamper 21h. This is done by controlling the operation of the substrate alignment unit operating mechanism 32 (FIG. 5) including actuators such as the drive motor My and the X table drive motor Mx (FIG. 4).

The movement of the squeegee unit 23 (movement of the moving plate 23p) is performed by the operation control of the squeegee unit moving mechanism 33 (FIG. 5) including an actuator not shown in the figure, and the squeegee 23a is moved up and down. The controller 30 controls the operation of the squeegee lifting mechanism 34 (FIG. 5) including the squeegee lifting cylinder 23s.

  The movement operation in the Y-axis direction of the X-axis stage 24b constituting the XY robot 24 and the movement operation in the X-axis direction of the movement plate 24c are performed by an XY robot operating mechanism 35 (FIG. ).

  The first camera 25a is controlled by the control device 30, and images the substrate position detection mark M (FIG. 3) provided on the substrate PB aligned by the substrate alignment unit 21 (FIG. 5). The two cameras 25b are controlled by the control device 30 and image a mask position detection mark (not shown) provided on the mask plate 22 (FIG. 5). Image data obtained by imaging with the first camera 25a and image data obtained by imaging with the second camera 25b are input to the control device 30 (FIG. 5).

  The movement of the syringe unit 26 (movement of the moving plate 26p) is performed when the control device 30 controls the operation of the syringe unit moving mechanism 36 (FIG. 5) including an actuator (not shown), and the paste 26 is supplied by the syringe 26a. The control device 30 controls the operation of the syringe operation mechanism 37 (FIG. 5) including an actuator (not shown).

  The control device 30 of the screen printing machine 1 uses a detection means (not shown) to transfer the substrate PB from the operator (or another device (not shown) installed on the upstream side of the screen printing machine 1) to the substrate conveyance path 4 (the carry-in conveyor 11). When it is detected that it has been loaded, the carry-in conveyor 11 and the positioning conveyor 12 are operated, and the loaded substrate PB is received by the carry-in conveyor 11 and carried into the screen printing machine 1 and delivered to the positioning conveyor 12. When receiving the substrate PB from the positioning conveyor 12, the control device 30 operates the positioning conveyor 12 as it is, stops the positioning conveyor 12 when the substrate PB reaches the work execution position, and positions the substrate PB at the work execution position. (Substrate positioning step).

  After positioning the substrate PB at the work execution position, the control device 30 raises the second elevating plate 21f relative to the first elevating plate 21e and brings the upper surface of the lower receiving unit 21g into contact with the lower surface of the substrate PB from below. Then, the substrate PB is supported by the lower receiving unit 21g. After the substrate PB is supported by the lower receiving unit 21g, the control device 30 clamps the substrate PB by the clamper 21h and fixes the substrate PB on the positioning conveyor 12 (that is, on the substrate transport path 4) (substrate fixing step). .

  After fixing the substrate PB on the positioning conveyor 12, the control device 30 performs the movement of the camera unit 25 and the imaging operation control of the first camera 25a to acquire the image data of the substrate position detection mark M of the substrate PB, and the substrate PB. The position of the mask plate 22 is acquired by obtaining the image data of the mask position detection mark of the mask plate 22 by moving the camera unit 25 and controlling the imaging operation of the second camera 25b.

  After grasping the position of the substrate PB and the position of the mask plate 22, the control device 30 moves the substrate PB in the horizontal plane direction by the substrate alignment unit 21 and positions the substrate PB at a predetermined position directly below the mask plate 22. After that, the upper surface of the substrate PB is brought into contact with the lower surface of the mask plate 22 from below by moving the substrate PB in the vertical direction (raising the first elevating plate 21e) by the substrate alignment unit 21 (see FIG. 6A). Arrow B1) shown in the figure. As a result, the mask plate 22 is aligned with the substrate PB (FIG. 6A, substrate alignment step).

  After aligning the substrate PB with respect to the mask plate 22, the control device 30 executes screen printing on the substrate PB. First, the syringe unit 26 is moved above the mask plate 22, and the paste PT such as solder paste or conductive paste is supplied from the syringe 26a to the upper surface of the mask plate 22 (FIG. 6A). ).

  When supplying the paste PT to the upper surface of the mask plate 22, the control device 30 lowers one squeegee 23 a and brings the lower edge of the squeegee 23 a into contact with the upper surface of the mask plate 22. Then, the squeegee unit 23 is moved in the Y-axis direction, and the squeegee 23a is slid on the mask plate 22 to scrape the paste PT (arrow B2 shown in FIG. 6 (b)). (Fig. 6B. Squeezing step).

  After filling the pattern hole of the mask plate 22 with the paste PT, the control device 30 lowers the second elevating plate 21f relative to the first elevating plate 21e and separates the mask plate 22 from the substrate PB. Thereby, so-called plate separation is performed, and the paste PT filled in the pattern holes of the mask plate 22 is printed (transferred) onto the substrate PB (plate separation step).

  The control device 30 prints the paste PT on the substrate PB, and when the screen printing operation on the substrate PB is completed, the control device 30 operates the substrate alignment unit 21 to adjust the position of the positioning conveyor 12 relative to the carry-out conveyor 13. When the position adjustment of the positioning conveyor 12 with respect to the carry-out conveyor 13 is completed, the control device 30 operates the positioning conveyor 12 and the carry-out conveyor 13 to transfer the substrate PB from the positioning conveyor 12 to the carry-out conveyor 13, and further, the substrate by the carry-out conveyor 13. The PB is carried out to another device or the like disposed on the downstream side of the screen printing machine 1 (substrate carrying out step).

  By the way, as shown in FIGS. 1, 2, and 3, the main body cover 2 of the screen printing machine 1 has a carry-in conveyor cover that covers the end of the carry-in conveyor 11 protruding from the input side opening 2 a of the main body cover 2. 41 and a carry-out conveyor cover 42 covering the end of the carry-out conveyor 13 protruding from the discharge side opening 2b of the main body cover 2 is provided.

  The carry-in conveyor cover 41 includes a substrate loading passage opening 41a that serves as a passage for the substrate PB when the substrate PB is loaded into the carry-in conveyor 11 from the outside, and a loading-side access opening 41b for accessing the carry-in conveyor 11 from the outside. Is provided. Further, the carry-out conveyor cover 42 has a substrate discharge passage opening 42a that becomes a passage for the substrate PB when the substrate PB is discharged from the carry-out conveyor 13 to the outside, and a discharge-side access for accessing the carry-out conveyor 13 from the outside. An opening 42b is provided. Further, the carry-in conveyor cover 41 is provided with a carry-in side door member 41c that covers the carry-in side access opening 41b so that it can be opened and closed. The carry-out conveyor cover 42 carries out a carry-out that covers the carry-out side access opening 42b so that it can be opened and closed. A side door member 42c is provided.

The carry-in side door member 41c is attached to the carry-in conveyor cover 41 via a hinge H and can be opened and closed up and down. A grip portion P is provided on the upper surface of the carry-in side door member 41c. For this reason, the operator can inspect the carry-in conveyor 11 and the like by pulling up and opening the carry-in side door member 41c with the hinge H as a fulcrum and holding the carry-in side access opening 41b upward. it can. Similarly, the carry-out side door member 42c is attached to the carry-out conveyor cover 42 via a hinge H and can be opened and closed up and down. A grip portion P is provided on the upper surface of the carry-out side door member 42c. For this reason, the operator can inspect the carry-out conveyor 13 and the like by pulling and opening the carry-out side door member 42c with the hinge H as a fulcrum with the gripping part P and exposing the carry-out side access opening 42b upward. . (See FIGS. 2, 7 and 8).

  7 and 8, an upper end portion of the sensor mounting bracket SB extending downward is attached to the lower surface of the carry-in side door member 41c, and a first sensor of the carry-in side optical sensor 41d is attached to the lower end of the sensor mounting bracket SB. A projector S1 which is a component is provided. In addition, on the inner surface of the carry-in conveyor cover 41, a light receiver S2 that is a second sensor component of the carry-in side optical sensor 41d is provided.

  Here, the light projector S1 and the light receiver S2 are conveyed by the carry-in conveyor 11 so that the carry-in conveyor 11 is sandwiched in the width direction (Y direction) in a plan view with the carry-in side door member 41c closed ( In the upper region of the substrate PB to be carried in (see FIG. 7A and FIG. 8A), it is provided so as to face the projector S1 when the carry-in door member 41c is closed. Since the light receiver S2 faces the width direction (Y-axis direction) of the carry-in conveyor 11, inspection light L can be exchanged between the light projector S1 and the light receiver S2, but the carry-in side door member 41c is opened. Then, the projector S1 and the light receiver S2 do not face each other, and the inspection light L cannot be exchanged between the projector S1 and the light receiver S2.

  When the carry-in side door member 41c is closed, the light projector S1 and the light receiver S2 exchange the inspection light L in the upper region of the substrate PB transported by the carry-in conveyor 11 (FIGS. 7A and 8). a)) It is possible to detect that foreign matter has entered the space covered by the carry-in conveyor cover 41 (specifically, the region above the carry-in conveyor 11) from the substrate loading passage opening 41a. On the other hand, when the carry-in side door member 41c is opened, the light projector S1 and the light receiver S2 do not transmit or receive the inspection light L (FIGS. 7B and 8B). It is impossible to detect that a foreign object has entered.

  Similarly, in FIG.7 and FIG.8, the upper end part of the sensor attachment bracket SB extended downward is attached to the lower surface of the carry-out side door member 42c, and the lower end of the sensor attachment bracket SB has the carry-out side optical sensor 42d. A projector S1 that is a first sensor component is provided. Further, on the inner surface of the carry-out conveyor cover 42, a light receiver S2 that is a second sensor component of the carry-out side optical sensor 42d is provided.

  Here, the light projector S1 and the light receiver S2 are conveyed by the carry-out conveyor 13 so as to sandwich the carry-out conveyor 13 in the width direction (Y-axis direction) in a plan view with the carry-out side door member 42c closed. In the upper region of the substrate PB to be (unloaded), it is provided so as to oppose substantially in the horizontal direction (FIGS. 7A and 8A), and the projector S1 in the state where the unloading side door member 42c is closed. Since the light receiver S2 faces the width direction (Y-axis direction) of the carry-out conveyor 13, the inspection light L can be exchanged between the light projector S1 and the light receiver S2, but the carry-out side door member 42c is opened. In this state, the projector S1 and the light receiver S2 do not face each other, and the inspection light L cannot be exchanged between the projector S1 and the light receiver S2.

  When the carry-out side door member 42c is closed, the light projector S1 and the light receiver S2 exchange inspection light L in the upper region of the substrate PB transported by the carry-out conveyor 13 (FIGS. 7A and 8 (A) and FIG. a)) It is possible to detect that foreign matter has entered the space covered by the carry-out conveyor cover 42 (specifically, the region above the carry-out conveyor 13) from the substrate discharge passage opening 42a. On the other hand, when the carry-out side door member 42c is opened, the light projector S1 and the light receiver S2 do not transmit or receive the inspection light L (FIGS. 7B and 8B), and therefore from the substrate discharge passage opening 42a. It is impossible to detect that a foreign object has entered.

  In FIG. 5, the carry-in side optical sensor 41d (light projector S1 and light receiver S2) is connected to the control device 30, and the control device 30 inspects the inspection light between the light projector S1 and the light receiver S2 constituting the carry-in side optical sensor 41d. The open / close state of the carry-in side door member 41c is detected depending on whether or not L can be exchanged. Specifically, when the inspection light L can be transmitted and received between the light projector S1 and the light receiver S2 of the carry-in side optical sensor 41d, the closed state of the carry-in side door member 41c is detected, and the light projector S1 and the light receiver are received. When the transfer of the inspection light L between the containers S2 is impossible, the state where the carry-in side door member 41c is opened is detected. Further, when the closed state of the carry-in side door member 41c is detected, based on the change in the state of transfer of the inspection light L between the light projector S1 and the light receiver S2 (specifically, the light receiver S2 When the light receiving state of the inspection light L is switched from the light receiving state to the non-light receiving state), it is detected that foreign matter has entered the space covered by the carry-in conveyor cover 41 from the substrate loading passage opening 41a.

  Similarly, in FIG. 5, the carry-out side optical sensor 42d (light projector S1 and light receiver S2) is connected to the control device 30, and the control device 30 is located between the light projector S1 and the light receiver S2 constituting the carry-out side optical sensor 42d. The open / close state of the carry-out side door member 42c is detected depending on whether or not the inspection light L can be transferred. Specifically, when the inspection light L can be transmitted and received between the light projector S1 and the light receiver S2 of the carry-out side optical sensor 42d, the state in which the carry-out side door member 42c is closed is detected, and the light projector S1 and the light receiver are received. When the inspection light L cannot be exchanged between the containers S2, the state where the carry-out side door member 42c is opened is detected. Further, when the state where the carry-out side door member 42c is closed is detected, based on the change in the state of the inspection light L exchanged between the projector S1 and the light receiver S2 (specifically, the light receiver S2 When the light receiving state of the inspection light L is switched from the light receiving state to the non-light receiving state), it is detected that foreign matter has entered the space covered by the carry-out conveyor cover 42 from the substrate discharge passage opening 42a.

  As described above, the control device 30 detects that foreign matter has entered from the substrate insertion passage opening 41a by the carry-in side optical sensor 41d, or detects that foreign matter has entered from the substrate discharge passage opening 42a by the carry-out side optical sensor 42d. When detected, the fact is displayed on the display device 50 (FIGS. 1 and 5) provided on the main body cover 2 to alert the operator, and the operations of the substrate transport path 4 and the printing work execution unit 5 are stopped. . As a result, even if the operator accidentally inserts his / her hand through the substrate insertion passage opening 41a or the substrate discharge passage opening 42a, the operator's work can be secured, and foreign matter has entered. However, since it is possible to prevent the foreign matter from being carried toward the work execution unit 5 by the substrate transport path 4, the operator can work with peace of mind.

  The control device 30 detects that the carry-in side light member 41c is opened by the carry-in side optical sensor 41d when starting the screen printing work by the substrate conveyance path 4 and the print work execution unit 5, or carries out the carry-out side light. When it is detected by the sensor 42d that the carry-out side door member 42c is opened, the fact is displayed on the display device 50 to alert the operator, and the operation of the substrate transport path 4 and the printing work execution unit 5 is performed. Do not start. Further, the control device 30 detects that the carry-in side light member 41c is opened by the carry-in side optical sensor 41d during the screen printing operation, or detects that the carry-out side light member 42c is opened by the carry-out side optical sensor 42d. When detected, the fact is displayed on the display device 50 to alert the operator, and the operation of the substrate transport path 4 and the printing work execution unit 5 is stopped. This prevents the substrate transport path 4 and the printing work execution unit 5 from operating in a state where the operator may insert his hand or foreign matter may enter from the loading side access opening 41b or the unloading side access opening 42b. The operator's work can be made safe.

As described above, the screen printing machine 1 according to the present embodiment covers the carry-in conveyor 11 (carrying conveyor) that carries the substrate PB and the end of the carry-in conveyor 11, and the substrate PB is placed on the carry-in conveyor 11 from the outside. A loading conveyor cover provided with a substrate loading passage opening 41a (substrate passage opening) serving as a passage for the substrate PB when loaded and a loading side access opening 41b (access opening) for accessing the loading conveyor 11 from the outside. 41 (conveyor conveyor cover), a carry-in door member 41c (door member) provided on the carry-in conveyor cover 41 so as to open and close the carry-in access opening 41b and a carry-in door member 41c. Light receiving device S2 (second sensor unit) fixed to the projector S1 (first sensor component) and the carry-in conveyor cover 41 ), The inspection light L can be exchanged between the projector S1 and the light receiver S2 when the carry-in door member 41c is closed, and the light projector S1 when the carry-in door member 41c is opened. And inspection light L between the light-receiving device S2 and the light-receiving device S2 and the light-receiving device S2 and the light-receiving device S2 that make up the light-receiving-side optical sensor 41d. When the open / close state of the carry-in side door member 41c is detected depending on whether or not it is possible, and the closed state of the carry-in side door member 41c is detected, the inspection light L between the light projector S1 and the light receiver S2 is detected. There is provided a substrate transfer device comprising detection means (control device 30) for detecting that foreign matter has entered the space covered by the carry-in conveyor cover 41 from the substrate input passage opening 41a based on the change in the state of transfer. .

  Further, the screen printing machine 1 according to the present embodiment covers the carry-out conveyor 13 (carrying conveyor) that carries the substrate PB and the end of the carry-out conveyor 13, and the substrate PB is discharged from the carry-out conveyor 13 to the outside. An unloading conveyor cover 42 (conveying conveyor cover) provided with an unloading side access opening 42b (access opening) for accessing the unloading conveyor 13 from the outside, and a substrate discharge path opening 42a (substrate path opening) serving as a path for the substrate PB ), A carry-out side door member 42c (door member) provided on the carry-out conveyor cover 42 so as to be able to open and close the carry-out side access opening 42b, and a light projector S1 (fixed to the carry-out side door member 42c) The first sensor component) and the light receiver S2 (second sensor component) fixed to the carry-out conveyor cover 42 are When the side door member 42c is closed, the inspection light L can be exchanged between the light projector S1 and the light receiver S2, and when the carry-out side door member 42c is opened, the light projector S1 and the light receiver S2 Whether or not the inspection light L can be exchanged between the unloading side optical sensor 42d (optical sensor) that cannot transmit and receive the inspection light L between the projector S1 and the light receiver S2 constituting the unloading side optical sensor 42d. When the open / close state of the carry-out side door member 42c is detected and the state in which the carry-out side door member 42c is closed is detected, the change in the state of the inspection light L exchanged between the light projector S1 and the light receiver S2 Is provided with a substrate transfer device comprising a detection means (control device 30) for detecting that foreign matter has entered the space covered by the carry-out conveyor cover 42 from the substrate discharge passage opening 42a.

  In the substrate transfer apparatus in the present embodiment, the door member depends on whether or not the inspection light L can be exchanged between the light projector S1 and the light receiver S2 of the optical sensor (the carry-in side optical sensor 41d or the carry-out side optical sensor 42d). When the open / close state of the (load-in side door member 41c or the carry-out side door member 42c) is detected, the door member is closed, and the inspection light L can be transferred between the light projector S1 and the light receiver S2, the light projector S1 Intrusion of foreign matter from the substrate passage opening of the transport conveyor cover (the carry-in conveyor cover 41 or the carry-out conveyor cover 42) can be detected based on a change in the state of transfer of the inspection light L between the optical receiver S2 and the light receiver S2. It has become. As described above, in the substrate transfer apparatus according to the present embodiment, since the open / closed state of the door member can be detected by the optical sensor for detecting the intrusion of the foreign matter, a dedicated sensor for detecting the open / close of the door member is unnecessary. Thus, it is possible to detect the intrusion of foreign matter from the substrate passage opening of the transport conveyor cover and the open / closed state of the door member covering the access opening with an inexpensive and simple configuration.

Further, in the present embodiment, when the door member (the carry-in side door member 41c or the carry-out side door member 42c) is closed, the light projector S1 and the light receiver S2 are moved by the transport conveyor (the carry-in conveyor 11 or the carry-out conveyor 13). The inspection light L is exchanged in the upper region of the substrate PB to be conveyed, and the inspection light L is not blocked by the substrate PB during the conveyance of the substrate PB, and the foreign matter is accurately detected. Be able to.

  Further, the screen printing machine 1 as the electronic component mounting apparatus in the present embodiment covers the conveyance conveyor (the carry-in conveyor 11 or the carry-out conveyor 13) that conveys the substrate PB and the end of the conveyance conveyor, and conveys it from the outside. A substrate passage opening (substrate loading passage opening 41a or substrate discharge passage opening 42a) that becomes a passage for the substrate PB when the substrate PB is loaded into the conveyor or when the substrate PB is discharged from the conveyance conveyor to the outside, and external to the conveyance conveyor A transport conveyor cover (loading conveyor cover 41 or unloading conveyor cover 42) provided with an access opening (loading side access opening 41b or unloading side access opening 42b) for access from the Door member (opening side door member 41c or unloading side door part) which covers opening for opening freely 42c), a first sensor component (light projector S1) fixed to the door member, and a second sensor component (light receiver S2) fixed to the transport conveyor cover. The inspection light L can be exchanged between the first sensor component and the second sensor component in the closed state, and between the first sensor component and the second sensor component when the door member is opened. Test light L between the first sensor component and the second sensor component constituting the optical sensor and the optical sensor (the carry-in side optical sensor 41d or the carry-out side optical sensor 42d) that cannot transfer the test light L. Whether the door member is opened or closed based on whether it is possible or not, and when the door member is closed, the inspection light L is transferred between the first sensor component and the second sensor component. Substrate passage opening based on changes in Detecting means for detecting that a foreign object has entered the space covered by the transport conveyor cover, and the substrate PB is transported and positioned by the transport conveyor, and an operation for mounting electronic components on the positioned substrate PB (here, A printing work execution unit 5 is provided as a working device for performing screen printing work).

  The working method of the electronic component mounting apparatus in the present embodiment is the working method of the screen printing machine 1 (electronic component mounting apparatus), and is an optical sensor (carry-in side optical sensor 41d or carry-out side optical sensor 42d). Depending on whether or not the inspection light L can be exchanged between the first sensor component (light projector S1) and the second sensor component (light receiver S2) constituting the door member (the carry-in side door member 41c or the carry-out side door). When detecting the open / closed state of the member 42c) and detecting the closed state of the door member, based on the change in the state of the inspection light L exchanged between the first sensor component and the second sensor component, Foreign matter has entered the space covered by the transfer conveyor cover (the carry-in conveyor cover 41 or the carry-out conveyor cover 42) from the substrate passage opening (the substrate input passage opening 41a or the substrate discharge passage opening 42a). It is adapted to perform the detection.

  In the working method of the screen printing machine 1 and the screen printing machine 1 according to the present embodiment, the work for mounting electronic components is performed using the inexpensive board conveying device according to the present embodiment. Can be reduced.

  Although the embodiments of the present invention have been described so far, the present invention is not limited to those shown in the above-described embodiments. For example, in the above-described embodiment, the door member that is provided on the transport conveyor cover and covers the access opening so as to be openable and closable can be opened and closed up and down via the hinge H, but the configuration of the door member is limited. Instead, it may be configured to slide vertically or horizontally.

  In the above-described embodiment, the first sensor component fixed to the door member is the projector S1, and the second sensor component fixed to the transport conveyor cover is the light receiver S2. However, the first sensor component may be the light receiver S2, and the second sensor component may be the projector S1. Further, the first sensor component and the second sensor component may not be a combination of a projector and a light receiver, and may be a combination of a projector and a reflector, for example.

  Moreover, the board | substrate conveyance apparatus which concerns on this invention is not restricted to the screen printer 1 mentioned above, It can apply also to other electronic component mounting apparatuses, such as an electronic component mounting apparatus and an external appearance inspection apparatus. In this case, the electronic component mounting operation performed by the electronic component mounting apparatus includes an electronic component mounting operation for mounting the electronic component on the substrate PB in the electronic component mounting apparatus, and a screen printing operation or an electronic component mounting operation in the appearance inspection apparatus. Appearance inspection work for inspecting the appearance of the substrate PB is completed.

  Substrate transport device, electronic component mounting device, and electronic component mounting capable of detecting the intrusion of foreign matter from the substrate passage opening of the transport conveyor cover and the open / closed state of the door member covering the access opening with an inexpensive and simple configuration A working method of the apparatus is provided.

The perspective view of the screen printer in one embodiment of this invention The side view of the screen printer in one embodiment of the present invention The top view of the screen printer in one embodiment of the present invention The front view of the printing work execution part which comprises the screen printer in one embodiment of this invention The block diagram which shows the control system of the screen printer in one embodiment of this invention (A) (b) Operation | movement explanatory drawing of the printing work execution part which comprises the screen printer in one embodiment of this invention (A) (b) The perspective view of the conveyance conveyor cover of the screen printer in one embodiment of this invention (A) (b) The cross-sectional front view of the conveyance conveyor cover of the screen printer in one embodiment of this invention

Explanation of symbols

11 Carry-in conveyor (conveyor)
30 Control device (detection means)
41 Carry-in conveyor cover (conveyor cover)
41a Substrate input passage opening (Substrate passage opening)
41b Loading side access opening (access opening)
41c Loading side door member (door member)
41d Loading side optical sensor (optical sensor)
S1 Floodlight (first sensor component)
S2 Receiver (second sensor component)
L Inspection light PB substrate

Claims (5)

A transport conveyor for transporting the substrate;
Covers the end of the transfer conveyor and externally accesses the substrate path opening and the transfer conveyor when the substrate is loaded into the transfer conveyor from the outside or when the substrate is discharged from the transfer conveyor to the outside. A transport conveyor cover provided with an access opening;
A door member provided on the transport conveyor cover so as to freely open and close the access opening;
The first sensor component is fixed to the door member and the second sensor component is fixed to the transport conveyor cover. When the door member is closed, the first sensor component and the second sensor component are provided. An optical sensor capable of transferring inspection light between sensor parts, and incapable of transferring inspection light between the first sensor part and the second sensor part when the door member is opened;
The open / close state of the door member is detected depending on whether inspection light can be exchanged between the first sensor component and the second sensor component constituting the optical sensor, and the closed state of the door member is detected. Detection that detects that a foreign object has entered the space covered by the transport conveyor cover from the substrate passage opening based on a change in the state of inspection light exchange between the first sensor component and the second sensor component. And a substrate transport apparatus.   2. The substrate transport according to claim 1, wherein when the door member is closed, the first sensor component and the second sensor component exchange inspection light in an upper region of the substrate transported by the transport conveyor. apparatus. A transport conveyor for transporting the substrate;
Covers the end of the transfer conveyor and externally accesses the substrate path opening and the transfer conveyor when the substrate is loaded into the transfer conveyor from the outside or when the substrate is discharged from the transfer conveyor to the outside. A transport conveyor cover provided with an access opening;
A door member provided on the transport conveyor cover so as to freely open and close the access opening;
The first sensor component is fixed to the door member and the second sensor component is fixed to the transport conveyor cover. When the door member is closed, the first sensor component and the second sensor component are provided. An optical sensor capable of transferring inspection light between sensor parts, and incapable of transferring inspection light between the first sensor part and the second sensor part when the door member is opened;
The open / close state of the door member is detected depending on whether inspection light can be exchanged between the first sensor component and the second sensor component constituting the optical sensor, and the closed state of the door member is detected. Detection that detects that a foreign object has entered the space covered by the transport conveyor cover from the substrate passage opening based on a change in the state of inspection light exchange between the first sensor component and the second sensor component. Means,
A work device that transports and positions the board by a transport conveyor, and performs work for mounting electronic components on the positioned board;
An electronic component mounting apparatus comprising:   4. The electronic component according to claim 3, wherein when the door member is closed, the first sensor component and the second sensor component exchange inspection light in an upper region of the substrate transported by the transport conveyor. Mounting device. A transport conveyor that transports the substrate, a substrate passage opening that covers the end of the transport conveyor and serves as a path for the substrate when the substrate is loaded into the transport conveyor from the outside or when the substrate is discharged from the transport conveyor to the outside; and A transport conveyor cover provided with an access opening for accessing the transport conveyor from the outside, a door member provided on the transport conveyor cover for opening and closing the access opening, and fixed to the door member. The first sensor component and the second sensor component fixed to the transport conveyor cover are provided. When the door member is closed, inspection light is exchanged between the first sensor component and the second sensor component. An optical sensor that can perform the inspection, and cannot transfer inspection light between the first sensor component and the second sensor component when the door member is opened; And positioned more transporting the substrate, a working method of the electronic component mounting apparatus and a working device for performing the work of mounting electronic parts on the positioning the substrate,
The open / close state of the door member is detected depending on whether inspection light can be exchanged between the first sensor component and the second sensor component constituting the optical sensor, and the closed state of the door member is detected. Detecting that a foreign object has entered the space covered by the transfer conveyor cover from the substrate passage opening based on a change in the state of inspection light exchange between the first sensor component and the second sensor component. An electronic component mounting apparatus working method characterized by the above.

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